A tapping device for motor shaft

Abstract

This invention relates to the field of tapping machine technology, and more particularly to a motor shaft tapping device, comprising a base, a housing mounted on the upper surface of the base via a lifting mechanism, a tapping drill bit mounted on the lower surface of the housing via a drive mechanism, a lifting cover mounted at the front end of the lower surface of the housing via an adjusting mechanism, and the lifting cover being located outside the tapping drill bit, a sliding cylinder slidably inserted into the lower port of the lifting cover via an elastic mechanism, the lower end of the sliding cylinder being connected to a frustum, and two gates slidably inserted into the inner side of the sliding cylinder via a telescopic mechanism. This invention utilizes blind hole sealing inflation and high-pressure instantaneous release to form an explosive airflow that powerfully strips away stubborn debris and achieves intermittent automatic reciprocating cleaning; simultaneously, it utilizes a converging cylinder and a guiding bucket to form a concentrated directional airflow, significantly improving the blowing intensity and utilization rate, and, combined with directional thrust, smoothly discharges debris, thoroughly solving the residue problem and effectively improving tapping quality and processing stability.

Description

Technical Field

[0001] This invention relates to the field of tapping machine technology, and more particularly to a tapping device for a motor shaft. Background Technology

[0002] During the machining process of motor shafts, drilling and chamfering of the shaft ends are usually required. After machining, batch tapping of the shaft end holes is necessary. In traditional tapping processes, metal chips generated during drilling and chamfering are easily left inside the holes. If tapping is performed directly, the chips are easily stuck between the tap and the hole wall, causing problems such as tap breakage, thread damage, or scratches on the workpiece hole wall, which seriously affects the machining accuracy and yield of the motor shaft.

[0003] To achieve hole cleaning before tapping, existing technologies mostly employ manual blowing or simple air blowing structures. These methods suffer from drawbacks such as incomplete cleaning, dispersed airflow, and easy retention of debris at the bottom and walls of the hole. Furthermore, conventional air blowing devices struggle to generate a controllable, instantaneous release of high pressure, failing to effectively remove firmly attached debris. Moreover, the use of open-type air blowing structures results in diffused airflow over a wide area, making it difficult to create a concentrated airflow for targeted cleaning of the bottom and walls of blind holes, leading to incomplete removal and residue of fine debris.

[0004] Therefore, a tapping device for motor shaft is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a motor shaft tapping device.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a motor shaft tapping device, comprising a base, a housing mounted on the upper surface of the base via a lifting mechanism, a tapping drill bit mounted on the lower surface of the housing via a drive mechanism, a lifting cover mounted at the front end of the lower surface of the housing via an adjusting mechanism, and the lifting cover being located outside the tapping drill bit, a sliding cylinder slidably inserted into the lower port of the lifting cover via an elastic mechanism, a frustum connected to the lower end of the sliding cylinder, two gates slidably inserted into the inner side of the sliding cylinder via a telescopic mechanism, symmetrical gathering cylinders fixedly connected to the adjacent edges of the lower surfaces of the two gates, a guide bucket connected to the lower end of the gathering cylinder, an air inlet hole common to the rear edges of the two gathering cylinders, and an air inlet fixedly embedded in the rear surface of the sliding cylinder, the port of the air inlet being aligned with the air inlet hole.

[0007] Preferably, the lifting mechanism includes a vertical slide fixedly installed at the rear of the upper surface of the base, a connecting platform fixedly installed at the moving end of the vertical slide, and the rear surface of the housing fixedly installed on the front surface of the connecting platform.

[0008] Preferably, the adjusting mechanism includes a vertical cylinder fixedly installed on the front surface of the housing, a lifting plate fixedly connected to the telescopic end of the vertical cylinder, and the rear end of the lifting plate fixedly connected to the upper end of the lifting cover.

[0009] Preferably, the elastic mechanism includes a vertical guide rod fixedly connected to one side of the lower end face of the lifting cover, a sleeve plate slidably sleeved on the outer surface of the vertical guide rod, a compression spring fixedly connected between the sleeve plate and the lifting cover, the sleeve plate slidably contacting the upper surface of the gate, the vertical guide rod being located on the rear surface of one side of the gate, and a pneumatic locking mechanism being provided on the rear surface of the gate.

[0010] Preferably, the pneumatic locking mechanism includes a square rod slidably inserted into the rear surface of the gate. A first slot is formed on the side of the square rod near the vertical guide rod, and a second slot is formed on the side of the vertical guide rod near the square rod. The second slot is slidably fitted onto the rear end of the outer surface of the square rod. An anti-detachment edge is fixedly connected to the front end of the upper surface of the square rod. A square groove is formed on the rear surface of the gate. An inner guide groove is formed at the front end of the inner top of the square groove. The square rod is slidably inserted into the inner side of the square groove. The anti-detachment edge is slidably engaged into the inner side of the inner guide groove. A return spring is fixedly connected between the inner wall of the inner guide groove and the rear surface of the anti-detachment edge. An air passage is provided at the front end of the square groove.

[0011] Preferably, the air passage includes a bent hole formed inside the gate and connected to the front end of the square groove, one end of the bent hole is connected to an air hole, and the air hole is located on the lower surface of the gate.

[0012] Preferably, the telescopic mechanism includes two symmetrical transverse cylinders fixedly connected to the outer surface of the sliding cylinder. The telescopic end of the transverse cylinder is fixedly connected to a side plate, which is fixedly connected to the side end of the gate plate. Gate grooves are respectively opened on both sides of the sliding cylinder, and an inner groove is opened below the gate groove. The gate plate slides into the inner side of the gate groove, and the two gathering cylinders move away from each other and enter the inner side of the inner groove.

[0013] Preferably, a drive motor is fixedly mounted on the upper surface of the housing, the output shaft of the drive motor is fixedly connected to a drive shaft, the drive shaft is rotatably connected to the inner side of the housing, and the upper end of the tapping drill bit is fixedly embedded in the lower end face of the drive shaft.

[0014] Preferably, a base plate is fixedly connected to the upper surface of the base, and clamping cylinders are fixedly connected to both sides of the upper surface of the base plate. Clamping plates are fixedly connected to the telescopic ends of the clamping cylinders, and V-shaped blocks are fixedly connected to the sides of the two clamping plates that are close to each other. The V-shaped blocks on both sides are staggered in height.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention employs a structure of blind hole sealing and inflation with high-pressure instantaneous release, which can generate an instantaneous burst airflow inside the hole, powerfully peeling off the debris attached to the bottom and wall of the hole, solving the problem that traditional low-pressure purging cannot remove stubborn debris; This invention enables intermittent automatic reciprocating cleaning operations through blind hole sealing inflation and controllable air pressure release, significantly improving the thoroughness of cleaning inside blind holes and effectively preventing the residue of fine debris. This invention reduces airflow diffusion by using the gathering effect of the gathering cylinder, and then precisely converges the airflow into a concentrated airflow bundle through the guide bucket, which can be blown directionally along the central axis of the blind hole, significantly improving airflow utilization and purging intensity; Based on pressurized air blowing inside the blind hole, this invention, combined with directional airflow, can generate auxiliary thrust, smoothly guiding the surging debris to the mating gap between the frustum and the rounded corner, and expelling it along with the main airflow, effectively avoiding debris residue. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a motor shaft tapping device according to the present invention; Figure 2 This is a schematic diagram of the V-block of a motor shaft tapping device according to the present invention; Figure 3 This is a schematic diagram of the housing of a motor shaft tapping device according to the present invention; Figure 4 This is a schematic diagram of the connection between the lifting cover and the sliding cylinder of a motor shaft tapping device according to the present invention; Figure 5 This is a cross-sectional view of the lifting cover and sliding cylinder of a motor shaft tapping device according to the present invention; Figure 6 This invention relates to a tapping device for a motor shaft. Figure 5 Enlarged view of point A in the middle; Figure 7 This is a cross-sectional view of the gate plate of a motor shaft tapping device according to the present invention; Figure 8 This is a schematic diagram showing the disassembled portion of the square rod and vertical guide rod of the motor shaft tapping device of the present invention; Figure 9 This is a schematic diagram of the gate plate of a motor shaft tapping device according to the present invention; Figure 10 This is a partial cross-sectional view of a motor shaft tapping device according to the present invention during operation.

[0017] The components include: 1. Housing; 2. Drive shaft; 3. Drive motor; 4. Tapping drill bit; 5. Lifting cover; 6. Sliding cylinder; 7. Crust; 8. Inflation nozzle; 9. Gate; 10. Gate groove; 11. Gathering cylinder; 12. Guide bucket; 13. Air inlet; 14. Inner groove; 15. Air hole; 16. Bending hole; 17. Square groove; 18. Square rod; 19. Anti-detachment edge; 20. Inner guide groove; 21. Reset. 21. Spring; 22. First bayonet; 23. Vertical guide rod; 24. Second bayonet; 25. Sleeve plate; 26. Compression spring; 27. Vertical cylinder; 28. Lifting plate; 29. ​​Side connecting plate; 30. Horizontal cylinder; 31. Connecting platform; 32. Base; 33. Base plate; 34. Clamping cylinder; 35. Clamping plate; 36. V-block; 37. Vertical slide table; 38. Motor shaft; 39. Blind hole; 40. Rounded corner opening. Detailed Implementation

[0018] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0019] like Figures 1-10 The illustrated motor shaft tapping device includes a base 32. A housing 1 is mounted on the upper surface of the base 32 via a lifting mechanism. A tapping drill bit 4 is mounted on the lower surface of the housing 1 via a drive mechanism. A lifting cover 5 is mounted at the front end of the lower surface of the housing 1 via an adjusting mechanism, and the lifting cover 5 is located outside the tapping drill bit 4. A sliding cylinder 6 is slidably inserted into the lower port of the lifting cover 5 via an elastic mechanism. A frustum 7 is connected to the lower end of the sliding cylinder 6. Two gates 9 are slidably inserted into the inner side of the sliding cylinder 6 via a telescopic mechanism. Symmetrical gathering cylinders 11 are fixedly connected to the adjacent edges of the lower surfaces of the two gates 9. A guide bucket 12 is connected to the lower end of the gathering cylinder 11. An air inlet 13 is opened on the rear edge of the two gathering cylinders 11. An air inlet 8 is fixedly embedded in the rear surface of the sliding cylinder 6, and the port of the air inlet 8 is aligned with the air inlet 13.

[0020] like Figure 1 As shown, the lifting mechanism includes a vertical slide 37 fixedly installed on the rear side of the upper surface of the base 32. A connecting platform 31 is fixedly installed on the moving end of the vertical slide 37, and the rear surface of the housing 1 is fixedly installed on the front surface of the connecting platform 31. The vertical slide 37 is a linear transmission component, preferably a servo slide, used to provide linear reciprocating drive in the vertical direction to realize the lifting feed of tapping.

[0021] like Figure 3 , Figure 10As shown, the adjusting mechanism includes a vertical cylinder 27 fixedly installed on the front surface of the housing 1. A lifting plate 28 is fixedly connected to the telescopic end of the vertical cylinder 27, and the rear end of the lifting plate 28 is fixedly connected to the upper end of the lifting cover 5. The telescopic movement of the vertical cylinder 27 drives the lifting plate 28 and the lifting cover 5 to move up and down, thereby adjusting and positioning the height of the lifting cover 5. This ensures a reliable seal between the rounded corner 40 of the frustum 7 and the motor shaft 38, and provides stable positional support and motion assurance for subsequent cleaning and tapping processes.

[0022] like Figures 4-9 As shown, the elastic mechanism includes a vertical guide rod 23 fixedly connected to one side of the lower end face of the lifting cover 5. A sleeve plate 25 is slidably sleeved on the outer surface of the vertical guide rod 23. A compression spring 26 is fixedly connected between the sleeve plate 25 and the lifting cover 5, and is always in a pre-compression state to provide a downward elastic restoring force for the sleeve plate 25. The sleeve plate 25 slides in contact with the upper surface of the gate plate 9 to prevent interference with the subsequent lateral movement of the gate plate 9. The vertical guide rod 23 is located on the rear surface of one side of the gate plate 9, and a pneumatic locking mechanism is provided on the rear surface of the gate plate 9.

[0023] The pneumatic locking mechanism includes a square rod 18 slidably inserted into the rear surface of the gate plate 9. A first slot 22 is provided on the side surface of the square rod 18 near the vertical guide rod 23, and a second slot 24 is provided on the side surface of the vertical guide rod 23 near the square rod 18. The second slot 24 is slidably sleeved on the rear end of the outer surface of the square rod 18 to achieve locking and limiting between the square rod 18 and the vertical guide rod 23. An anti-detachment edge 19 is fixedly connected to the front end of the upper surface of the square rod 18. A square groove 17 is provided on the rear surface of the gate plate 9. An inner guide groove 20 is provided at the front end of the inner top face of the square groove 17. The square rod 18 is slidably inserted into the inner side of the square groove 17, and the anti-detachment edge 19 is slidably locked into the inner side of the inner guide groove 20. A return spring 21 is fixedly connected between the inner wall of the inner guide groove 20 and the rear surface of the anti-detachment edge 19 to provide a forward elastic return force for the square rod 18. An air passage is provided at the front end of the square groove 17 to introduce air pressure to push the square rod 18 to move.

[0024] The air passage includes a bent hole 16 inside the gate 9 and connected to the front end of the square groove 17. One end of the bent hole 16 is connected to an air hole 15, which is located on the lower surface of the gate 9 and is used to communicate with the air source of the blind hole 39 to realize the stable access and transmission of high-pressure gas, ensure that the air pressure can smoothly act on the square rod 18, and realize the reliable unlocking of the pneumatic locking mechanism.

[0025] like Figure 4 , Figure 5 , Figure 6 , Figure 9As shown, the telescopic mechanism includes two symmetrical transverse cylinders 30 fixedly connected to the outer surface of the sliding cylinder 6. The telescopic end of the transverse cylinder 30 is fixedly connected to a side plate 29, which is fixedly connected to the side end of the gate plate 9. Gate grooves 10 are respectively opened on both sides of the sliding cylinder 6, and an inner groove 14 is opened below the gate grooves 10. The gate plate 9 slides into the inner side of the gate groove 10, and the two converging cylinders 11 move away from each other and enter the inner side of the inner groove 14, thereby avoiding the tapping space and avoiding motion interference with the drill bit and workpiece.

[0026] like Figure 3 , Figure 5 As shown, a drive motor 3 is fixedly mounted on the upper surface of the housing 1. The output shaft of the drive motor 3 is fixedly connected to a drive shaft 2, which is rotatably connected to the inner side of the housing 1. The upper end of the tapping drill bit 4 is fixedly embedded in the lower end face of the drive shaft 2. Rotating synchronously with the drive shaft 2, it provides stable cutting power for tapping. The upper end of the tapping drill bit 4 can be fixedly embedded in the lower end face of the drive shaft 2 through methods such as taper shank engagement, set screw locking, ER chuck clamping, or flat key connection. The shank section of the tapping drill bit 4 is relatively long, ensuring that the lower tapping part can fully extend into the blind hole 39. After the lifting cover 5 moves upward, it will not touch the lower surface of the housing 1, thus ensuring that the tapping part of the tapping drill bit 4 is completely exposed.

[0027] like Figure 1 , Figure 2 As shown, a base plate 33 is fixedly connected to the upper surface of the base 32. Clamping cylinders 34 are fixedly connected to both sides of the upper surface of the base plate 33. Clamping plates 35 are fixedly connected to the telescopic ends of the clamping cylinders 34. V-shaped blocks 36 are fixedly connected to the sides of the two clamping plates 35 that are close to each other. The V-shaped blocks 36 on both sides are staggered at different heights.

[0028] In use, the user clamps and fixes the motor shaft 38 using several V-blocks 36 on both sides. The vertical cylinder 27 extends downwards, causing the frustum 7 to embed into the inner side of the rounded corner opening 40 to form a seal. Figure 10As shown, the pipe connecting the air pump is then connected to the air inlet 8 and inflated. The inflated air enters the blind hole 39, creating high pressure inside. The pressure is transmitted to the square groove 17 through the air hole 15 and the bend hole 16, which in turn pushes the square rod 18 backward, squeezing the return spring 21. When the first latch 22 moves backward to the side of the vertical guide rod 23, the sliding cylinder 6 moves upward instantaneously under the action of the air pressure inside the blind hole 39, and the first latch 22 slides relative to the surface of the vertical guide rod 23. At the same time, the high-pressure gas inside the blind hole 39 is released rapidly. With the impact force of the instantaneous burst of airflow, the debris attached to the hole wall and deposited at the bottom of the hole is fully peeled off, and the debris is driven to be discharged outward at high speed along the fit gap between the frustum surface 7 and the rounded corner opening 40, forming a directional debris discharge channel to ensure that there is no debris retention. During the cleaning process, the air nozzle 8 remains continuously inflated. The airflow diffusion is reduced by the converging action of the gathering cylinder 11, and then the airflow is precisely converged into a concentrated airflow stream by the guide bucket 12. This stream is blown inward along the central axis of the blind hole 39, causing the airflow and debris to surge and diffuse to the surrounding area. At the same time, it forms an auxiliary airflow thrust, guiding the surging debris smoothly into the mating gap between the frustum 7 and the rounded corner 40, and finally discharged with the main airflow. This further improves the thoroughness of the cleaning inside the blind hole 39, avoids the residue of small debris, and achieves the cleaning of the inside of the blind hole 39 before tapping. This effectively avoids the problem of workpiece damage or damage to the tapping drill bit 4 caused by debris interference during the tapping process.

[0029] After the gas is discharged from the blind hole 39, the sleeve plate 25 pushes the gate plate 9 downward under the elastic force of the compression spring 26, which in turn causes the sliding cylinder 6 to move downward. The square rod 18 also moves downward at the same time. The first latch 22 slides down relative to the vertical guide rod 23. When the height of the first latch 22 reaches the second latch 24, the anti-detachment edge 19 moves forward and resets under the elastic force of the return spring 21. The rear end of one side of the square rod 18 is once again locked into the inner side of the second latch 24, achieving the limiting function. This prevents the sliding cylinder 6 from being lifted when the air pressure in the blind hole 39 is low, thus preventing the formation of effective air pressure in the blind hole 39.

[0030] After the gas flushing in the blind hole 39 is completed, the horizontal cylinder 30 is controlled to retract, causing the two gate plates 9 to move away from each other. The inner end of the gate plate 9 moves to the inner side of the gate groove 10, and the gathering cylinder 11 and the guide bucket 12 move to the inner side of the inner groove 14 to ensure that they do not interfere with the subsequent downward movement of the tapping drill bit 4. Then, the vertical cylinder 27 is retracted, causing the lifting cover 5 and the sliding cylinder 6 to move upward to ensure that they do not affect the tapping step. After that, the vertical slide 37 controls the connecting platform 31 to move downward, thereby allowing the tapping drill bit 4 to drill into the inner side of the blind hole 39 to achieve tapping.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A tapping device for a motor shaft, comprising a base (32), characterized in that: The upper surface of the base (32) is fitted with a housing (1) via a lifting mechanism. The lower surface of the housing (1) is fitted with a tapping drill bit (4) via a drive mechanism. The front end of the lower surface of the housing (1) is fitted with a lifting cover (5) via a distance adjustment mechanism. The lifting cover (5) is located outside the tapping drill bit (4). The lower port of the lifting cover (5) is slidably fitted with a sliding cylinder (6) via an elastic mechanism. The lower end of the sliding cylinder (6) is connected to a frustum (7). The inner side of the sliding cylinder (6) is slidably fitted with two gates (9) via a telescopic mechanism. The lower surfaces of the two gates (9) are respectively fixedly connected with symmetrical gathering cylinders (11). The lower end of the gathering cylinders (11) is connected with a guide bucket (12). The rear edges of the two gathering cylinders (11) are jointly provided with an air inlet (13). The rear surface of the sliding cylinder (6) is fixedly fitted with an air inlet (8). The port of the air inlet (8) is aligned with the air inlet (13). The elastic mechanism includes a vertical guide rod (23) fixedly connected to one side of the lower end face of the lifting cover (5). A sleeve plate (25) is slidably sleeved on the outer surface of the vertical guide rod (23). A compression spring (26) is fixedly connected between the sleeve plate (25) and the lifting cover (5). The sleeve plate (25) slides in contact with the upper surface of the gate (9). The vertical guide rod (23) is located on the rear surface of one side of the gate (9), and a pneumatic locking mechanism is provided on the rear surface of the gate (9). The pneumatic locking mechanism includes a square rod (18) that is slidably inserted into the rear surface of the gate (9). A first slot (22) is provided on the side surface of the square rod (18) near the vertical guide rod (23). A second slot (24) is provided on the side surface of the vertical guide rod (23) near the square rod (18). The second slot (24) is slidably sleeved on the rear end of the outer surface of the square rod (18). An anti-detachment edge (19) is fixedly connected to the front end of the upper surface of the square rod (18). A square groove (17) is provided on the rear surface of the gate (9). An inner guide groove (20) is provided at the front end of the inner top face of the square groove (17). The square rod (18) is slidably inserted into the inner side of the square groove (17). The anti-detachment edge (19) is slidably inserted into the inner side of the inner guide groove (20). A reset spring (21) is fixedly connected between the inner wall of the inner guide groove (20) and the rear surface of the anti-detachment edge (19). An air passage is provided at the front end of the square groove (17). The air passage includes a bent hole (16) inside the gate (9) and connected to the front end of the square groove (17). One end of the bent hole (16) is connected to an air hole (15), which is located on the lower surface of the gate (9).

2. The motor shaft tapping device according to claim 1, characterized in that: The lifting mechanism includes a vertical slide (37) fixedly installed on the rear side of the upper surface of the base (32), and a connecting platform (31) is fixedly installed on the moving end of the vertical slide (37). The rear surface of the housing (1) is fixedly installed on the front surface of the connecting platform (31).

3. The motor shaft tapping device according to claim 1, characterized in that: The adjusting mechanism includes a vertical cylinder (27) fixedly installed on the front surface of the housing (1). The telescopic end of the vertical cylinder (27) is fixedly connected to a lifting plate (28), and the rear end of the lifting plate (28) is fixedly connected to the upper end of the lifting cover (5).

4. The motor shaft tapping device according to claim 1, characterized in that: The telescopic mechanism includes two symmetrical transverse cylinders (30) fixedly connected to the outer surface of the sliding cylinder (6). The telescopic end of the transverse cylinder (30) is fixedly connected to a side plate (29). The side plate (29) is fixedly connected to the side end of the gate plate (9). The two sides of the sliding cylinder (6) are respectively provided with gate grooves (10). The lower part of the gate groove (10) is provided with an inner groove (14). The gate plate (9) slides into the inner side of the gate groove (10). The two gathering cylinders (11) move away from each other and enter the inner side of the inner groove (14).

5. The motor shaft tapping device according to claim 1, characterized in that: A drive motor (3) is fixedly installed on the upper surface of the housing (1). The output shaft of the drive motor (3) is fixedly connected to a drive shaft (2). The drive shaft (2) is rotatably connected to the inner side of the housing (1). The upper end of the tapping drill bit (4) is fixedly embedded in the lower end face of the drive shaft (2).

6. The motor shaft tapping device according to claim 1, characterized in that: A base plate (33) is fixedly connected to the upper surface of the base (32). A clamping cylinder (34) is fixedly connected to both sides of the upper surface of the base plate (33). A clamping plate (35) is fixedly connected to the telescopic end of the clamping cylinder (34). A V-shaped block (36) is fixedly connected to the side of the two clamping plates (35) that are close to each other. The V-shaped blocks (36) on both sides are staggered in height position.

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